Write a function to calculate the factorial of a number.
import java.util.*;
public class Functions {
public static void printFactorial(int n) {
//loop
if(n < 0) {
System.out.println("Invalid Number");
return;
}
int factorial = 1;
for(int i=n; i>=1; i--) {
factorial = factorial * i;
}
System.out.println(factorial);
return;
}
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
printFactorial(n);
}
}
Take an array of numbers as input and check if it is an array sorted in ascending order.
Eg : { 1, 2, 4, 7 } is sorted in ascending order.
{3, 4, 6, 2} is not sorted in ascending order.
Write a program to enter the numbers till the user wants and at the end it should display the count of positive, negative and zeros entered.
Input an email from the user. You have to create a username from the email by deleting the part that comes after ‘@’. Display that username to the user.
Example :
email = “mejona@gmail.com” ; username = “mejona”
email = “helloWorld123@gmail.com”; username = “helloWorld123”
Write a function that takes in age as input and returns if that person is eligible to vote or not. A person of age > 18 is eligible to vote.